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arXiv · 2606.20080

Terahertz frequency upconversion by coherently driving charge dynamics in the InSb/CdTe heterostructure

Pai Peng·Mingxiang Pan·Jiuming Liu·Yi Yang·Lei Wang·Hao Lin·Zehao Hu·Jianlin Luo·Tao Dong·Xufeng Kou·Xinbo Wang·Huaqing Huang·Luyi Yang
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Abstract

We investigate terahertz (THz) harmonic generation in the InSb/CdTe heterostructure, demonstrating, for the first time, efficient in-plane magnetic field-induced second-harmonic generation (SHG). We also achieve significant third-harmonic generation (THG), rivalling Dirac materials such as graphene and Cd3As2. Our theoretical analysis identifies the primary SHG mechanism as the orbital-Zeeman correction to Drude conductivity, while the dominant THG contribution also shows Drude-like behavior. The results provide a general route to efficient THz harmonic generation in high mobility materials.

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Pai Peng, Mingxiang Pan, Jiuming Liu, Yi Yang, Lei Wang, Hao Lin, Zehao Hu, Jianlin Luo, Tao Dong, Xufeng Kou, Xinbo Wang, Huaqing Huang, Luyi Yang. 2026-06-18. Terahertz frequency upconversion by coherently driving charge dynamics in the InSb/CdTe heterostructure. https://arxiv.org/abs/2606.20080

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